Holder for fixing a mirror



FIG. 1 is a plan view of a holder for fixing a mirror embodying my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a perspective view thereof; and,

FIG. 7 is an environmental view thereof.

The broken line showing of the mirror in FIG. 7 is for the purpose of illustrating environmental structure and forms no part of the claimed design. 

The ornamental design for a holder for fixing a mirror, as shown and described. 